codeql/java/ql/test/library-tests/dataflow/range-analysis-inline/B.java

public class B {

    // Use this method to mark non-integer bounds
    // that should also be annotated.
    static void bound(int b) { }

    public int forLoop() {
        int result = 0;
        for (int i = 0;
            i < 10; // $ bound="i in [0..10]"
            i++) { // $ bound="i in [0..9]"
            result = i; // $ bound="i in [0..9]"
        }
        return result; // $ bound="result in [0..9]"
    }

    public int forLoopExit() {
        int result = 0;
        for (; result < 10;) { // $ bound="result in [0..10]"
            result += 1; // $ bound="result in [0..9]"
        }
        return result; // $ bound="result = 10"
    }

    public int forLoopExitStep() {
        int result = 0;
        for (; result < 10;) { // $ bound="result in [0..12]"
            result += 3; // $ bound="result in [0..9]"
        }
        return result; // $ bound="result = 12"
    }

    public int forLoopExitUpd() {
        int result = 0;
        for (; result < 10; // $ bound="result in [0..10]"
            result++) { // $ bound="result in [0..9]"
        }
        return result; // $ bound="result = 10"
    }

    public int forLoopExitNested() {
        int result = 0;
        for (; result < 10;) {
            int i = 0;
            for (; i < 3;) { // $ bound="i in [0..3]"
                i += 1; // $ bound="i in [0..2]"
            }
            result += i; // $ bound="result in [0..9]" bound="i = 3"
        }
        return result; // $ MISSING:bound="result = 12"
    }

    public int emptyForLoop() {
        int result = 0;
        for (int i = 0; i < 0; // $ bound="i = 0"
            i++) { // $ bound="i in [0..-1]"
            result = i; // $ bound="i in [0..-1]"
        }
        return result; // $ bound="result = 0"
    }

    public int noLoop() {
        int result = 0;
        result += 1; // $ bound="result = 0"
        return result; // $ bound="result = 1"
    }

    public int foreachLoop() {
        int result = 0;
        for (int i : new int[] {1, 2, 3, 4, 5}) {
            result = i;
        }
        return result;
    }

    public int emptyForeachLoop() {
        int result = 0;
        for (int i : new int[] {}) {
            result = i;
        }
        return result;
    }

    public int whileLoop() {
        int result = 100;
        while (result > 5) { // $ bound="result in [4..100]"
            result = result - 2; // $ bound="result in [6..100]"
        }
        return result; // $ bound="result = 4"
    }

    public int oddWhileLoop() {
        int result = 101;
        while (result > 5) { // $ bound="result in [5..101]"
            result = result - 2; // $ bound="result in [7..101]"
        }
        return result; // $ bound="result = 5"
    }

    static void arrayLength(int[] arr) {
        bound(arr.length);
        for (int i = 0;
            i < arr.length;
            i++) { // $ bound="i <= arr.length - 1"
            arr[i]++; // $ bound="i <= arr.length - 1"
        }
    }

    static int varBound(int b) {
        bound(b);
        int result = 0;
        for (int i = 0;
            i < b;
            i++) { // $ bound="i <= b - 1"
            result = i; // $ bound="i <= b - 1"
        }
        return result; // We cannot conclude anything here, since we do not know that b > 0
    }

    static int varBoundPositiveGuard(int b) {
        bound(b);
        if (b > 0) {
            int result = 0;
            for (int i = 0;
                i < b;
                i++) { // $ bound="i <= b - 1"
                result = i; // $ bound="i <= b - 1"
            }
            return result; // $ MISSING: bound="result <= b - 1"
        } else {
            return 0;
        }
    }

    static int varBoundPositiveGuardEarlyReturn(int b) {
        bound(b);
        if (b <= 0) return 0;
        int result = 0;
        for (int i = 0;
            i < b;
            i++) { // $ bound="i <= b - 1"
            result = i; // $ bound="i <= b - 1"
        }
        return result; // $ MISSING: bound="result <= b - 1"
    }

    static int varBoundPositiveAssert(int b) {
        bound(b);
        assert b > 0;
        int result = 0;
        for (int i = 0;
            i < b;
            i++) { // $ bound="i <= b - 1"
            result = i; // $ bound="i <= b - 1"
        }
        return result; // $ MISSING: bound="result <= b - 1"
    }
}